Page 240 - ICC IEBC 2018

RESOURCE A

TABLE 1.3.2—continued
WOOD FRAME WALLS
4″ TO LESS THAN 6″ THICK
PERFORMANCE REFERENCE NUMBER REC.
ITEM CODE THICKNESS CONSTRUCTION DETAILS NOTES
LOAD TIME PRE-BMS-92 BMS-92 POST-BMS-92 HOURS
1
2″ × 4″ wood stud wall; / ″ thick of 1:2; 1:2
2
3
1
W-5-W-88 5 / ″ gypsum plaster over / ″ gypsum lath on N/A 45 min. 43 21, 31 3 / 4
4
8
both sides of wall.
1
2″ × 4″ wood stud wall; / ″ thick of 1:2; 1:2
2
1
3
W-5-W-89 5 / ″ gypsum plaster over / ″ gypsum lath on N/A 1 hr. 43 21, 31, 33 1
4
8
both sides of wall.
1
2″ × 4 ″ wood stud wall; / ″ thick neat plas-
2
1
3
W-5-W-90 5 / ″ ter over / ″ thick gypsum lath on both sides N/A 1 hr. 43 21, 22, 31 1
4
8
of wall.
1
2″ × 4″ wood stud wall; / ″ thick of 1:2; 1:2
2
3
1
W-5-W-91 5 / ″ gypsum plaster over / ″ thick indented gyp- N/A 45 min. 43 21, 31 3 / 4
4
8
sum lath on both sides of wall.
1
2″ × 4″ wood stud wall; / ″ thick of 1:2; 1:2
2
1
3
W-5-W-92 5 / ″ gypsum plaster over / ″ thick perforated N/A 45 min. 43 21, 31, 34 3 / 4
4
8
gypsum lath on both sides of wall.
1
2″ × 4″ wood stud wall; / ″ thick of 1:2; 1:2
2
1
3
W-5-W-93 5 / ″ gypsum plaster over / ″ perforated gypsum N/A 1 hr. 43 21, 31 1
4
8
lath on both sides of wall.
1
2″ × 4″ wood stud wall; / ″ thick of 1:2; 1:2
2
1
3
W-5-W-94 5 / ″ gypsum plaster over / ″ thick perforated N/A 45 min. 43 21, 31, 34 3 / 4
4
8
gypsum lath on both sides of wall.
1
2″ × 4″ wood stud wall; / ″ thick of 1:2; 1:2
2
1
1
W-5-W-95 5 / ″ gypsum plaster over / ″ thick wood fiber- N/A 35 min. 43 21, 31, 36 1 / 2
2
2
board plaster base on both sides of wall.
1
2″ × 4″ wood stud wall; / ″ thick of 1:2; 1:2
2
3
7
W-5-W-96 5 / ″ gypsum plaster over / ″ thick flameproofed N/A 1 hr. 43 21, 31, 37 1
4
8
wood fiberboard on both sides of wall.
For SI: 1 inch = 25.4 mm, 1 foot = 305 mm, 1 pound = 0.004448 kN, 1 pound per square inch = 0.00689 MPa, 1 pound per square foot = 47.9 N/m . 2
Notes:
1. All specimens 8 feet or 8 feet 8 inches by 10 feet 4 inches, i.e. one-half of furnace size. See Note 42 for design cross section.
2. Specimens tested in tandem (two per exposure).
3. Test per ASA No. A2-1934 except where unloaded. Also, panels were of “half” size of furnace opening. Time value signifies a thermal failure time.
4. Two-inch by 4-inch studs: 16 inches on center.; where 10 feet 4 inches, blocking at 2-foot 4-inch height.
3
5. Facing 4 feet by 8 feet, cement-asbestos board sheets, / inch thick.
16
1
6. Sheathing (diagonal): 25/22 inch by 5 / inch, 1 inch by 6 inches pine.
2
5
7. Facing shingles: 24 inches by 12 inches by / 32 inch where used.
8. Asbestos felt: asphalt sat between sheathing and shingles.
9. Load: 30,500 pounds or 360 psi/stud where load was tested.
10. Walls were tested beyond achievement of first test end point. A load-bearing time in excess of performance time indicates that although thermal criteria
were exceeded, load-bearing ability continued.
11. Wall was rated for one hour combustible use in original source.
12. Hose steam test specimen. See table entry of similar design above for recommended rating.
13. Rated one and one-fourth hour load bearing. Rated one and one-half hour nonload bearing.
14. Failed hose stream.
15. Test terminated due to flame penetration.
16. Test terminated—local back face temperature rise.
17. Nominal 2-inch by 4-inch wood studs of No. 1 common or better lumber set edgewise. Two-inch by four-inch plates at top and bottom and blocking at mid
height of wall.
2
18. Cavity insulation consists of rock wool bats 1.0 lb./ft. of filled cavity area.
2
19. Cavity insulation consists of glass wool bats 0.6 lb./ft. of filled cavity area.
2
20. Cavity insulation consists of blown-in forck wool 2.0 lbs./ft. of filled cavity area
21. Mix proportions for plastered walls as follows: first ratio indicates scratch coat mix, weight of dry plaster: dry sand; second ratio indicates brown coat mix.
22. “Neat” plaster is taken to mean unsanded wood-fiber gypsum plaster.
23. Load: 360 psi of net stud cross sectional area.
24. Rated as nonload bearing.
(continued)
2018 INTERNATIONAL EXISTING BUILDING CODE ® 221
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